Pipe Reducer Requirements
With pipe reducers, a smaller meter can be mounted in larger pipelines. This arrangement may increase low-flow accuracy.
There are no special requirements for standard, concentric, pipe reducers.
Custom fabricated pipe reducers must have an approximate slope angle of 15 degrees to minimize flow disturbances and
excessive loss of head. If this is not possible, install the custom pipe reducers as if they were fittings and install the required
amount of straight pipe
Figure 9: Pipe Reducer Requirements
Chemical Injection Applications
For water line applications with a chemical injection point, install the meter upstream of the injection point. This eliminates
any meter performance issues.
Figure 10: Chemical Injection Point Upstream of Meter
If a meter must be installed downstream of a chemical injection connection, the distance between the meter and the
injection point should be between 50 and 100 feet (15 and 30 meters). The distance must be long enough to allow the water
or chemical solution to reach the meter in a complete, homogeneous mixture.
Figure 11: Chemical Injection Point Upstream of Meter
If the injection point is too close, the meter senses the two different conductivities for each liquid. This will likely result in
inaccurate measurements. The injection method—spaced bursts, continuous stream of drips or liquid or gas—can also affect
downstream readings by the meter.
M-Series® M5000 Electromagnetic Flow Meter
Page 10 September 2013
| sales@mvandc.com | Phone: 877.566.3837 | Fax: 925.407.2903
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